Lifting-jack.



PATENTED SEPT. 25, 1906. N. WEILER.

LIPTING JACK.

AP-PLIOATION FILED .TUNE 12. 1905.

3 SHEETS-SHEET 1.

THE NOR-RIS PETERS 654,;1! NYDN D C l a No. 831,756. PATENTED SEPT; 25,1906. N. WEILBR.

LIFTING JACK'.

APPLIOATIM FILED JUNE 12.1905.

3 SHEETS-SHEET Z.

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N. WEILER. LIFTING JACK.

APPLICATION IILBD JUNI: 12.1905.

3 SHEETS-SHEET 3.

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UNITED sTATEs PATENT "oir-.Eroli Specification of Letters Patent.

PatentedSept. 25, 1906.

Application filed June 12, 1905. Serial No. 264.826.

To all whom, it may concern:

Be it known that I, NICHOLAS WEILER, a citizen of the United States,residing at Sioux City, in the county of Woodbury and State of Iowa,have invented a new and useful Improvement in Lifting-Jacks; and I dodeclare the following to be a full, clear, and exact description of thesame, reference being had to the accompanying drawings, forming a partthereof.

My invention relates to lifting-jacks; and the object of my invention isto provide a jack which may be operated in one direction to raise theload and reversed when it is desired to lower it.

It is desi ed as an improvement upon my lifting jac patented une 27,1905, No. 793,167.

In the accompanying drawings, Figure 1 is a vertical sectional viewshowing the operating (parts of the jack, the springs being remove Fig.2 is a cross-sectional view on line C D, Fig. 1. Fig. 3 iscross-sectional view on line'A B, 1. Fig. 4 is a diagrammatic viewshowing the operation of levers. Fig. 5 is a cross-sectional view online E F, Fig. l. Fig. 6 is an enlarged detail view showing longitudinalsection of operatinglever and the reversing mechanism. Fig. 7 is asection of outer end of operating-lever. Fig. 8 is a cross-sectionalView on line X Y, Fig. 5. Fig. 9 is a detail view of joints in rod usedwhen load is lowered.

The invention consists of a frame inclosing a hollow bar having teethupon one side, levers pivotally connected with the frame, pawlssupported by carriages in the frame and operated by springsv and levers,and a reversing mechanism operated in connection with the principallever.

Referring now to the drawings, J is the outer frame, inclosing thehollow toothed bar G, having teeth G2.

J 2 is the base of the frame, and J J braces connecting the frame andbase and supporting the frame. On each side of the front of the frameare cogged sectors J 3 J 2, projecting somewhat from the frame andformed in one piece with the frame. A lever L, forked at the end appliedto raising the load, has sectors L L, with cogs L2, adapted to mesh withthe cogs on the sectors J5. The forked ends of the lever L are pivotallysupported by an axis L3, extending through them and also through the Hatvertical bars M M, which extend. from the axis L3 to an axis M3, andthe.'V

narrow horizontal bars M M', which are pivotally supported at theirinner ends by the short axes M4 M4 in the outside of theV frame. Theaxis M3 corresponds to the axis L3, and the outer ends of the narrowhorizontal bars M2 are pivotally supported at the inner endsz by theaxes M5 M5, corresponding to the axes brace J4, connecting the two sidesof the` frame of the jack. The pawl-carriage O is hollow and ispivotallysup orted between the horizontal bars M near t e inner ends ofsaid bars by short axes N N, secured to the bars and extending inwardlyinto annular o enings in the sides of the tpawl-carriage, ig. 8. Theouter end of' t e carriage is rounded and extends. outward through theannular opening in the piece K. The pawl I?, having a large headl andnarrow stem, is located inside of the carriage and is adapted to engagethe teeth of the toothed bar. stem of the pawlextends outward throughthe rounded art of the carriage, andthe outer extremity is threaded andprovided with a nut P5. A coil-spring P5 encircles the pawl and restsbetween the head of the pawl and the outer part of the pawl-carriage,the pressure of the springs on the carriage holding the pawl firmlyagainst the toothed bar. A pawl-carriage O2, similar to the carriage O,is pivotally supported between the horizontal bars M2 by axes N2 N2therounded part of the carriage extending through the other opening in theiece K. This carriage is rovided with a li e pawl P2, having the samelfind of spring and at the outer end a nut P4.

The axes M4, supporting the inner ends of the bars M', between which theu per pawlcarriage is pivoted, being situated at about the center of thecarriage and in front of the axes N of the pawl-carriage, this carriageand pawl are lowered when the lever is raised. The axes M5 beingsituated in the rear of the lower pawl-carriage and of its axes N2, thiscarriage and pawl are raised when the operat- The IOO

ing-lever is raised. When a movement is imparted to the operating-lever,the awls and carriages are alternately elevate the lower ones beingraised when the outer end of the lever 'is elevated, the spring holdingthe pawl in engagement. At the same timefthe upper pawl is lowered andforced out of en- ILO gagement with the toothed bar. At the downwardstroke of' the lever the upper pawl 1s raised, carrying the bar upward,and at the same time the lower pawl is forced out of engagement., and,being free of the load, permits the bar to pass. The coil-springsnormally hold both pawls against the bar, and they are only out ofengagement during the alternatin r stroke of thc lever. When it isdesired to ower the load, the operation is reversed. By throwing thepawls outward at each stroke of the lever the bar is lowered instead ofraised. A fiat perpendicular piece R, having two slots corresponding tothe two awls and a rounded projection R is adjusted to the stems of thepawls and held in place between the rounded parts of the carri ages andthe nuts on the ends of the stems, the projection being about midwaybetween the pawls. A lever R4, having a cam projection or enlarged end,is pivoted to the round ed projection of the piece R by means of 'theaxis R2, and when the outer end of the lever R4 is raised the roundedpart presses against the piece K above the center of the piece, pullingthe lower end of the piece R outward andv forces the lower pawl out ofengagement. When the lever is lowered, the movement is reversed andv theupper pawl is forced out. This lever may thus be used at will toalternatelythrow the pawls out in lowering the load. In Figs. 6, 7, and9 is shown a means for using this lever in connection with theoperating-lever L, which, being hollow, is l'engthened by the insertionof the handle L4. A button R3 is secured to the lever R4 and a cord Rsecured thereto, passing over a pulley R" upon the shaft L3 and over thelever L, where it is secured to a rod having jointed parts S, T, and U,the latter being secured to a hand-lever V, pivotally secured to thehandle L4. The joints are provided in order that the rod may be easilytaken apart when the handle is removed'. The part S is provided withslots S and S2, through which are inserted', respectively, the headedbrads S3 and S4, which are driven into the handle L4. At the upper endof the part S is a button S5, and the lower end ofthe part T is providedwith a slot or eye, which hooks upon the button. The part T has near thecenter a slot T2, through which is inserted into the handle L4 theheaded bradv T. The lower end of the u per art U is formed into a hookand inserte in a ole in the upper end of the part T. The parts S and Tare thus permitted to slide upon the lever and handle during theoperation of the lever R4. When the handle is removed, the part T isfirst unhooked from the button S5 and removed from the brad T To removeas much friction as ossible from the bar G during its operation, tliebar is provided with rojecting tongues G G upon each side, w ch slidealong the pulleys Gr7 upon the axes Gfs in the upper part of the sidesof the frame. At the lower end the bar is provided with a pulley Guponan axis G4, pivotally secured in an extension G5 on tho back side of thebar. The slot in the back side of the frame, Fig. 5, extending the wholeheight of the frame, permits the passage oi the roller, which pressesupon the sides of the frame adjacent to the slot. The bar G is hollowand on the back side is provided with slots, as G6, in which may beinserted a foot H, by means of a hook H3. The foot is also provided witha roller H upon an axis H2, pivotally secured in the frame of theI foot.The foot may be adjusted to the slot, and thus utilized when w ec s areto be raised.

Having described my invention, what I claim as new, anddesire to secureby Letters Patent, is

1. The combination with an 'upright movable bar having teeth on one sidethereof, and a frame supporting said bar, of bars fulcrum ed to theframe, pawls supported by said bars and adapted for engagement with saidtoothed bar, springs for normally holding said pawls in engagement, anda lever fulcrumed to said bars and adapted to elevate said pawls wherebythe same are alternately thrown into engagement with said toothed barand said bar raised, substantially as described.

2. The combination with an upright movable bar having teeth on one sidethereof, and a frame supplorting said bar, of bars fulcrumed to t eframe, pawl-carriages fulcrumed to said bars, pawls movable in saidcarriages and4 adapted for engagement with said bar, springs fornormally holding said pawls in engagement, and a lever fulcrumed to saidbars and adapted to alternately elevate said carriages and pawls wherebysaid toothed bar is raised, substantially as described.

3. The combination with an upright movable bar having teeth on one sidethereof, and a Jrame forming a guide or passage way for said bar, ofparallel, horizontal bars fulcrumed to said frame, pawl-carriagessupported by said bars, pawls movable in said carriages, and adapted toengage the teeth of said bars, springs for normally holding said pawlsin engagement, and a lever ulcrumed to said parallel bars and adapted toelevate the same whereby the pawls alternately engage the teeth of saidtoothed bar and said bar is raised, substantially as described.

4. The combination with an upright movable bar having teeth on one sidethereof, and a rame supporting said bar, of normally horizontal barsulcrumed near the center to the frame, a pawl-carriage fulcrumed to saidbars near the inner ends thereof, a pawl movable in said carriage andadapted to engage the teeth of said toothed bar, a spring fo. normallyholding said pawl in engage- IOO the teeth of said upright bar, a springfor normally holding said pawl in engagement, and a lever fulcrumed tosaid horizontal bars and adapted to alternately raise and lower thesame, substantially 'as described.

5. The combination with an upright movable bar having teeth on thefrontside thereof, a frame supporting said bar, and cogged sectors on thefront side of said frame, of normally horizontal bars fulcrumed to saidframe, pawls supported by said bars and adapted to engage said toothedbar, springs for normally holding said pawls in engagement, and a leverfulcrumed to said bars having cogs adapted to engage the cogs of saidsectors and raise said bars whereby the pawls are alternately elevatedand the upright bar raised, substantially as described.

6. The combination with an upright movable bar having teeth on the frontside thereof, a frame supporting said bar, and cogged sectors on thefront side of said frame, of normally horizontal bars fulcrumed near thecenter to the frame, a pawl fulcrumed to said bars near the inner endsthereof and adapted to engage the teeth of said upright bar, barsnormally horizontal fulcrumed at the inner ends to the frame, a pawlfulcrumed to said bars near the middle thereof and adapted to engage theteeth of said upright bar, means for normally holding said pawls inengagement, and a lever having cogs adapted to engage the cogs of saidsectors, fulcrumed to said horizontal bars and adapted to alternatelyraise and lower the same, substantially as described.

7. The combination with an upright movable bar having teeth on one sidethereof, and a frame supporting said bar, of bars fulcrumed to theframe, pawl-carriages supported by said bars, pawls movable in saidcarriages adapted to engage said upright bar, means for normally holdingsaid pawls in en. gagement, a lever fulcrumed to said bars and adaptedto elevate the same, and a lever pivotally connected with said pawls andadapted to throw the pawls out of engagement, substantially asdescribed.

8. The combination-.,with an upright movable bar having teeth on thefront side thereof, a frame supporting said bar, and cogged sectors onthe front side of said frame,of normally horizontal bars fulcrumed tosaid frame, pawl-carriages supported by said bars, pawls movable in saidcarriages and adapted to engage said upright bar, means for normallyholding said pawls in engagement, an operating-lever fulcrumed to saidbars having cogs adapted to engage the cogs of said sectors, a leverpivotally connected with said pawls and adapted to throw the pawls outof engagement, and means connecting said lever with the operating-leverwhereby both levers may be used together for lowering the load,substantially as described.

9.- The combination with a hollow, uprightmovable bar having teeth onone side thereof, and a frame supporting said bar, of bars fulcrumed tothe frame, pawls supported by said bars and adapted for engagement withsaid toothed bar, springs for normally holding said pawls in engagement,a lever fulcrumed to said bars and adapted to elevate said pawls wherebythe same are alternately thrown into engagement with said toothed barand said bar raised, and rollers against which said bar is adapted toslide when raised and lowered, substantially as described.

10. The combination with a hollow, upright movable bar having teeth onone side thereof and slots in one of the other sides of said bar, and aframe supporting said bar and having a slot in one side thereof, ofpawls adapted for engagement with said toothed bar, means for operatingsaid pawls and means for holding said pawls in engagement with said barwhereby the bar is raised and lowered, a foot adapted for adjustment tothe slots in said bar and a roller for reducing the friction between thefoot and frame, substantially as described.

In testimony whereof I have hereunto affixed my signature in thepresence of two witnesses.

NICHOLAS WEILER.

Witnesses:

E. F. SIMMoNs, RALPH H. MUNRO.

